// Copyright 2024 Vadim Kharitonovich
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package packet

type HeaderOpt[C RequestMessageCode | ResponseMessageCode] func(*Header[C])

func WithResponseRequirement() HeaderOpt[RequestMessageCode] {
	return func(h *Header[RequestMessageCode]) {
		h.requiresResponse = true
	}
}

type Header[C RequestMessageCode | ResponseMessageCode] struct {
	Version
	Code             C
	requiresResponse bool
}

func NewHeader[C RequestMessageCode | ResponseMessageCode](code C, opts ...HeaderOpt[C]) *Header[C] {
	h := Header[C]{
		Version: version,
		Code:    code,
	}

	for i := range opts {
		opts[i](&h)
	}

	return &h
}

func (r *Header[C]) Serialize() []byte {
	buf := make([]byte, RequestHeaderSize)
	r.SerializeInto(buf)
	return buf
}

func (r *Header[C]) RequiresResponse() bool {
	return r.requiresResponse
}

func (r *Header[C]) SerializeInto(buf []byte) {
	SerializeVersion(&r.Version, buf)
	SetMessageCode[C](r.Code, buf)
}
